CIS 527
Other Application Protocols
Image Source: Wikipedia
HTTP Connection
cis527@cis527russfeldpuppet:~$ telnet en.wikipedia.com 80
Trying 208.80.153.224...
Connected to en.wikipedia.com.
Escape character is '^]'.
GET /wiki/Main_Page HTTP/1.1
Host: en.wikipedia.org
HTTP/1.1 301 TLS Redirect
Server: Varnish
Location: https://en.wikipedia.org/wiki/Main_Page
Content-Length: 0
Accept-Ranges: bytes
Date: Fri, 26 Feb 2016 16:20:45 GMT
X-Varnish: 1427912479
Age: 0
Via: 1.1 varnish
Connection: closeHTTP Commands
- GET
- POST
- HEAD
- PUT
- DELETE
HTTP Status Codes
- 200
- 301
- 403
- 404
- 500
- 503
HTTP Status Codes
- 200 - OK
- 301 - Moved Permanently
- 403 - Forbidden
- 404 - Not Found
- 500 - Internal Server Error
- 503 - Service Unavailable
Email
- Protocol for sending messages across the internet
- Used as early as the 1970's as an extension to FTP
- Originally ASCII, extended by Multipurpose Internet Mail Extensions (MIME)
Email Procotols
- Post Office Protocol (POP3)
- Simple Mail Transfer Protocol (SMTP)
- Internet Message Access Protocol (IMAP)
- Exchange ActiveSync
SMTP Connection
cis527@cis527russfeldpuppet:~$ telnet smtp.ksu.edu 25
Trying 129.130.8.75...
Connected to smtp.ksu.edu.
Escape character is '^]'.
220 smtp4.cc.ksu.edu ESMTP Sendmail 8.14.3/8.14.3; Fri, 26 Feb 2016 10:46:47 -0600 (CST); Unsolicited Commercial Email (spam) is UNWELCOME
HELO smtp.ksu.edu
250 smtp4.cc.ksu.edu Hello dhcp251-10.cis.ksu.edu [129.130.10.251], pleased to meet you
MAIL FROM:
250 2.1.0 ... Sender ok
RCPT TO:
250 2.1.5 ... Recipient ok
DATA
354 Enter mail, end with "." on a line by itself
From: "Russell Feldhausen"
To: "Test"
Date: Fri, 26 February 2008 10:48:00 -0700
Subject: Test Message
This is a test from Russ! hope it goes through!
.
250 2.0.0 u1QGkl2x007949 Message accepted for delivery
QUIT
221 2.0.0 smtp4.cc.ksu.edu closing connection
Connection closed by foreign host.
POP3 Connection
cis527@cis527russfeldpuppet:~$ telnet mail.servergrove.com 110
Trying 69.195.222.232...
Connected to mail.servergrove.com.
Escape character is '^]'.
+OK POP3 ready
USER test@beattieunioncemetery.org
+OK
PASS uns3cur3
+OK logged in.
STAT
+OK 2 5580
RETR 1
+OK 4363 octets follow.
Received: (qmail 11929 invoked from network); 26 Feb 2016 16:16:14 +0000
Received-SPF: none (no valid SPF record)
Received: from mx-mia-1.servergrove.com (69.195.198.246)
by sg111.servergrove.com with SMTP; 26 Feb 2016 16:15:43 +0000
...
...
...
DELE 2
+OK message 2 deleted
QUIT
+OK Bye-bye.
Assignments
- Lab 3 - Core Networking Services: Due Monday 2/29 11:30 AM